Reference Marantz HDAM Classic Circuit hifi diy Field effect transistor input preamp board DIY kit

Product details:

The Marantz HDAM audio linear amplifier circuit in Japan has excellent sound quality, with excellent low frequencies, full midrange, and delicate high frequencies. It has a comfortable listening experience and the charm of electronic tubes.

Double sided gold-plated PCB.
ON LM317/337 stabilized voltage.
NOVER capacitors from the UK and WIMA capacitors from Germany.
Beijing 718 copper pin resistor.
Philips BCC556/546 transistor

Parameters: 
Size: 136 * 122mm 
Input voltage: AC14V * 2-AC18 * 2V 
External potentiometer resistance value: 50-100K 
Frequency band: 10Hz-40KHz 
Iutput impedance: 47K 
Onput impedance: 10 ohms 
Magnification factor: 4 times (adjustable resistance setting of 1-10 times)

List：
HDAM preamp board DIY kit x 1 set